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This article in SSSAJ

  1. Vol. 31 No. 3, p. 312-314
    Received: Oct 10, 1966
    Accepted: Jan 4, 1967

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Comparison of Water Content-Pressure Head Data Obtained by Equilibrium, Steady-State, and Unsteady-State Methods1

  1. G. C. Topp,
  2. A. Klute and
  3. D. B. Peters2



The water content-pressure head relationship for a small, well-confined, rectangular sample of fine sand was obtained under different water flow conditions. Water contents were measured by a gamma system and pressure heads were measured by a tensiometer-pressure transducer combination. During drying, more water was retained in the sand at a given pressure head in the unsteady flow case than in the static equilibrium and steady-state cases, which agreed with each other.

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